include/wx/msw/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/metafile.h
   3 // Purpose:     wxMetaFile, wxMetaFileDC and wxMetaFileDataObject classes
   4 // Author:      Julian Smart
   5 // Modified by: VZ 07.01.00: implemented wxMetaFileDataObject
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_METAFIILE_H_
  13 #define _WX_METAFIILE_H_
  14
  15 #include "wx/dc.h"
  16 #include "wx/gdiobj.h"
  17
  18 #if wxUSE_DRAG_AND_DROP
  19     #include "wx/dataobj.h"
  20 #endif
  21
  22 // ----------------------------------------------------------------------------
  23 // Metafile and metafile device context classes
  24 // ----------------------------------------------------------------------------
  25
  26 class WXDLLEXPORT wxMetafile;
  27
  28 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
  29 {
  30     friend class WXDLLEXPORT wxMetafile;
  31 public:
  32     wxMetafileRefData();
  33     ~wxMetafileRefData();
  34
  35 public:
  36     WXHANDLE m_metafile;
  37     int m_windowsMappingMode;
  38     int m_width, m_height;
  39 };
  40
  41 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  42
  43 class WXDLLEXPORT wxMetafile: public wxGDIObject
  44 {
  45 public:
  46     wxMetafile(const wxString& file = wxEmptyString);
  47     wxMetafile(const wxMetafile& metafile) { Ref(metafile); }
  48     virtual ~wxMetafile();
  49
  50     // After this is called, the metafile cannot be used for anything
  51     // since it is now owned by the clipboard.
  52     virtual bool SetClipboard(int width = 0, int height = 0);
  53
  54     virtual bool Play(wxDC *dc);
  55     bool Ok() const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  56
  57     // set/get the size of metafile for clipboard operations
  58     wxSize GetSize() const { return wxSize(GetWidth(), GetHeight()); }
  59     int GetWidth() const { return M_METAFILEDATA->m_width; }
  60     int GetHeight() const { return M_METAFILEDATA->m_height; }
  61
  62     void SetWidth(int width) { M_METAFILEDATA->m_width = width; }
  63     void SetHeight(int height) { M_METAFILEDATA->m_height = height; }
  64
  65     // Implementation
  66     WXHANDLE GetHMETAFILE() const { return M_METAFILEDATA->m_metafile; }
  67     void SetHMETAFILE(WXHANDLE mf) ;
  68     int GetWindowsMappingMode() const { return M_METAFILEDATA->m_windowsMappingMode; }
  69     void SetWindowsMappingMode(int mm);
  70
  71     // Operators
  72     wxMetafile& operator=(const wxMetafile& metafile)
  73         { if (*this != metafile) Ref(metafile); return *this; }
  74     bool operator==(const wxMetafile& metafile) const
  75         { return m_refData == metafile.m_refData; }
  76     bool operator!=(const wxMetafile& metafile) const
  77         { return m_refData != metafile.m_refData; }
  78
  79 private:
  80     DECLARE_DYNAMIC_CLASS(wxMetafile)
  81 };
  82
  83 class WXDLLEXPORT wxMetafileDC: public wxDC
  84 {
  85 public:
  86     // Don't supply origin and extent
  87     // Supply them to wxMakeMetaFilePlaceable instead.
  88     wxMetafileDC(const wxString& file = wxEmptyString);
  89
  90     // Supply origin and extent (recommended).
  91     // Then don't need to supply them to wxMakeMetaFilePlaceable.
  92     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  93
  94     virtual ~wxMetafileDC();
  95
  96     // Should be called at end of drawing
  97     virtual wxMetafile *Close();
  98     virtual void SetMapMode(int mode);
  99     virtual void GetTextExtent(const wxString& string, long *x, long *y,
 100             long *descent = NULL, long *externalLeading = NULL,
 101             wxFont *theFont = NULL, bool use16bit = false) const;
 102
 103     // Implementation
 104     wxMetafile *GetMetaFile() const { return m_metaFile; }
 105     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 106     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
 107     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 108
 109 protected:
 110     int           m_windowsMappingMode;
 111     wxMetafile*   m_metaFile;
 112
 113 private:
 114     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
 115 };
 116
 117 /*
 118  * Pass filename of existing non-placeable metafile, and bounding box.
 119  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 120  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 121  *
 122  */
 123
 124 // No origin or extent
 125 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 126
 127 // Optional origin and extent
 128 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
 129
 130 // ----------------------------------------------------------------------------
 131 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 132 // ----------------------------------------------------------------------------
 133
 134 #if wxUSE_DRAG_AND_DROP
 135
 136 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 137 {
 138 public:
 139     // ctors
 140     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 141         { }
 142     wxMetafileDataObject(const wxMetafile& metafile)
 143         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 144
 145     // virtual functions which you may override if you want to provide data on
 146     // demand only - otherwise, the trivial default versions will be used
 147     virtual void SetMetafile(const wxMetafile& metafile)
 148         { m_metafile = metafile; }
 149     virtual wxMetafile GetMetafile() const
 150         { return m_metafile; }
 151
 152     // implement base class pure virtuals
 153     virtual size_t GetDataSize() const;
 154     virtual bool GetDataHere(void *buf) const;
 155     virtual bool SetData(size_t len, const void *buf);
 156
 157 protected:
 158     wxMetafile m_metafile;
 159 };
 160
 161 #endif // wxUSE_DRAG_AND_DROP
 162
 163 #endif
 164     // _WX_METAFIILE_H_
 165